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query_executor: Record WaitingForConnection stat in all cases #15073

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merged 6 commits into from
Jan 31, 2024
Merged

query_executor: Record WaitingForConnection stat in all cases #15073

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f5a6741
Record `WaitingForConnection` stat in all cases
tycol7 Jan 29, 2024
07bb8bb
Record `WaitingForConnection` stat for `StreamConn`
tycol7 Jan 29, 2024
9d73ae1
Move stat increment into `defer func()`
tycol7 Jan 30, 2024
394a22c
Clean up syntax (move start time into defer func)
tycol7 Jan 30, 2024
a10c491
Add unit tests
tycol7 Jan 30, 2024
c1efce6
Add `defer db.Close()`
tycol7 Jan 30, 2024
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7 changes: 5 additions & 2 deletions go/vt/vttablet/tabletserver/query_executor.go
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Original file line number Diff line number Diff line change
Expand Up @@ -778,9 +778,10 @@ func (qre *QueryExecutor) getConn() (*connpool.PooledConn, error) {
start := time.Now()
conn, err := qre.tsv.qe.conns.Get(ctx, qre.setting)

qre.logStats.WaitingForConnection += time.Since(start)
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It's probably better to do this in a defer call right after start is initialized. That will be future-proof.

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@tycol7 tycol7 Jan 30, 2024 •
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9d73ae1 + 394a22c


switch err {
case nil:
qre.logStats.WaitingForConnection += time.Since(start)
return conn, nil
case connpool.ErrConnPoolClosed:
return nil, err
Expand All @@ -794,9 +795,11 @@ func (qre *QueryExecutor) getStreamConn() (*connpool.PooledConn, error) {

start := time.Now()
conn, err := qre.tsv.qe.streamConns.Get(ctx, qre.setting)

qre.logStats.WaitingForConnection += time.Since(start)

switch err {
case nil:
qre.logStats.WaitingForConnection += time.Since(start)
return conn, nil
case connpool.ErrConnPoolClosed:
return nil, err
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